<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
   <center>
       <form action="{url:exam/register}" method="post">
           用户名: <input type="text" name="name" id="name"><br>
           密码 : <input type="password" name="pwd" id="pwd"><br>
           邮箱: <input type="email" name="email" id="email"><br>
           <input type="button" id="btn" value="注册">
       </form>
   </center>
</body>
</html>
<script src="../../public/jquery-3.3.1.min.js"></script>
<script>
    $("#btn").click(function () {
        var name=$("#name").val();
        var pwd=$("#pwd").val();
        var email=$("#email").val();
        if(name=="" || pwd=="" || email=="")
        {
            alert("输入内容不能为空");
            return false;
        }
        var yx=/^\w+@\w+(\.)com$/;
        if(!yx.test(email))
        {
            alert("您的电子邮件格式不正确");
            return false;
        }
        $("form").submit();
    })
</script>